def __getitem__()

in src/data.py [0:0]


    def __getitem__(self, index):
        example = self.data[index]
        question = self.question_prefix + " " + example['question']
        target = self.get_target(example)

        if 'ctxs' in example and self.n_context is not None:
            f = self.title_prefix + " {} " + self.passage_prefix + " {}"
            contexts = example['ctxs'][:self.n_context]
            passages = [f.format(c['title'], c['text']) for c in contexts]
            scores = [float(c['score']) for c in contexts]
            scores = torch.tensor(scores)
            # TODO(egrave): do we want to keep this?
            if len(contexts) == 0:
                contexts = [question]
        else:
            passages, scores = None, None


        return {
            'index' : index,
            'question' : question,
            'target' : target,
            'passages' : passages,
            'scores' : scores
        }